<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="logo_box">
        <img src="../assets/logo.png" />
      </div>
      <!-- 表单区域 -->
      <el-form label-width="0px" class="login_form" :model="loginForm" :rules="loginRules" ref="loginFormRef">
        <el-form-item prop="username">
          <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="submitForm">登陆</el-button>
          <el-button type="info" @click="resetForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data(){
    return {
      loginForm:{
        username:'admin',
        password:'123456',
      },
      loginRules:{
        username:[
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 6, message: '长度在 3 到 6 个字符', trigger: 'blur' }
        ],
        password:[
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 12, message: '长度在 6 到 12 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
    submitForm(){
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        // 解构赋值
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败！')
        this.$message.success('登录成功')
        // 1. 将登录成功之后的 token，保存到客户端的 sessionStorage 中
        //   1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问
        //   1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
        window.sessionStorage.setItem('token', res.data.token) 
        // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
        // console.log(res)
      })
    },
    resetForm(){
      this.$refs.loginFormRef.resetFields();
    }
  }
};
</script>
<style lang="less" scoped>
.login_container {
  background-color: gray;
  height: 100%;
}
.login_box {
  background-color: honeydew;
  width: 400px;
  height: 350px;
  border-radius: 10%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .logo_box {
    border: 1px solid #eee;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    padding: 10px;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    box-shadow: 0 0 10px #ddd;
    img {
      width: 120px;
      height: 120px;
      border-radius: 50%;
      background-color: #eee;
    }
  }
  .btns{
    text-align: center;
  }
  .login_form{
    position: absolute;
    bottom: 0;
    width:100%;
    padding:50px;
    box-sizing: border-box;
  }
}
</style>